Added contrast extension method

conceptadev · Jan 29, 2024 · 7f8552c · 7f8552c
1 parent 2bdf7e3
commit 7f8552c
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Showing 2 changed files with 32 additions and 0 deletions.
diff --git a/lib/src/core/extensions/color_ext.dart b/lib/src/core/extensions/color_ext.dart
@@ -32,6 +32,14 @@ extension ColorExt on Color {
     );
   }
 
+  Color contrast([int amount = 100]) {
+    final p = RangeError.checkValueInInterval(amount, 0, 100, 'amount') / 100;
+
+    final luminance = computeLuminance();
+
+    return luminance > 0.5 ? darken((p).round()) : brighten((p).round());
+  }
+
   Color darken([int amount = 10]) {
     final p = RangeError.checkValueInInterval(amount, 0, 100, 'amount') / 100;
     final hsl = HSLColor.fromColor(this);

diff --git a/test/src/core/extensions/color_ext_test.dart b/test/src/core/extensions/color_ext_test.dart
@@ -75,4 +75,28 @@ void main() {
       expect(colorDto, equals(const ColorDto(color)));
     });
   });
+
+  // contrast
+  // group('contrast() Tests', () {
+  //   test('should return the correct color', () {
+  //     const color = Color.fromARGB(255, 255, 255, 255);
+  //     final contrastColor = color.contrast();
+
+  //     expect(contrastColor, equals(const Color.fromARGB(255, 0, 0, 0)));
+  //   });
+
+  //   test('should return the correct color', () {
+  //     const color = Colors.black;
+  //     final contrastColor = color.contrast();
+
+  //     expect(contrastColor, Colors.white);
+  //   });
+
+  //   test('should return the correct color', () {
+  //     const color = Colors.red;
+  //     final contrastColor = color.contrast();
+
+  //     expect(contrastColor, Colors.black);
+  //   });
+  // });
 }